Deleting scratch buffers

[vinicius507]

Greetings,

What would be the best way of deleting old/unused scratch buffers?
Would love if I was able to delete scratch buffers from branches that no longer exist, for example.

Thanks in advance.

[dpetka2001]

Either manually or create a custom picker for the fuzzy finder you use to do this. I use fzf-lua and have the following custom picker

local fzf = require("fzf-lua")
local utils = require("fzf-lua.utils")

local function hl_validate(hl)
  return not utils.is_hl_cleared(hl) and hl or nil
end

local function ansi_from_hl(hl, s)
  return utils.ansi_from_hl(hl_validate(hl), s)
end

function M.scratch_buffers()
  local entries = {}
  local items = Snacks.scratch.list()
  local item_map = {}

  for _, item in ipairs(items) do
    item.icon = item.icon or Snacks.util.icon(item.ft, "filetype")
    item.branch = item.branch and ("branch:%s"):format(item.branch) or ""
    item.cwd = item.cwd and vim.fn.fnamemodify(item.cwd, ":p:~") or ""
    local display = string.format("%s %s %s %s", item.cwd, item.icon, item.name, item.branch)
    table.insert(entries, display)
    item_map[display] = item
  end

  fzf.fzf_exec(entries, {
    winopts = {
      height = math.floor(math.min(vim.o.lines * 0.8, #entries + 3) + 0.5),
      width = 0.5,
    },
    prompt = "Scratch Buffers> ",
    fzf_opts = {
      ["--header"] = string.format(
        ":: <%s> to %s | <%s> to %s",
        ansi_from_hl("FzfLuaHeaderBind", "enter"),
        ansi_from_hl("FzfLuaHeaderText", "Select Scratch"),
        ansi_from_hl("FzfLuaHeaderBind", "ctrl-d"),
        ansi_from_hl("FzfLuaHeaderText", "Delete Scratch")
      ),
    },
    actions = {
      ["default"] = function(selected)
        local item = item_map[selected[1]]
        ---@diagnostic disable-next-line: missing-fields
        Snacks.scratch.open({ icon = item.icon, file = item.file, name = item.name, ft = item.ft })
      end,
      ["ctrl-d"] = function(selected)
        local item = item_map[selected[1]]
        os.remove(item.file)
        vim.notify("Deleted scratch file: " .. item.file)
        M.scratch_buffers()
      end,
    },
  })
end

You could probably do the same for Telescope, but I don't use it and can't be of help there.

[vinicius507]

Thanks, that was truly helpful :)

[briandipalma]

Taken from another comment I made in #207:

This works for me:

return {
  "folke/snacks.nvim",
  opts = {
    scratch = {
      win = {
        keys = {
          ["delete"] = {
            "<a-x>",
            function(self)
              vim.api.nvim_win_call(self.win, function()
                vim.cmd([[close]])
                os.remove(vim.api.nvim_buf_get_name(self.buf))
              end)
            end,
            desc = "Delete buffer",
            mode = { "n", "x" },
          },
        },
      },
    },
  },
}

[dpetka2001]

You might also want to keep a look at #1019 if it gets merged. It will provide the same functionality and some other goodies.